Maghemite (Fe2O3, γ-Fe2O3) is a member of the family of iron oxides. It has the same formula as hematite, but the same spinel ferrite structure as magnetite...
8 KB (787 words) - 18:44, 9 January 2024
nanoparticles or iron oxide nanoparticles (iron oxides in crystal structure of maghemite or magnetite) are the most explored magnetic nanoparticles up to date...
54 KB (5,995 words) - 00:12, 10 June 2024
produce brown pigment quality γ-Fe2O3 (maghemite): 2 Fe 3 O 4 ⏟ magnetite + 1 2 O 2 ⟶ 3 ( γ − Fe 2 O 3 ) ⏟ maghemite {\displaystyle {\ce {\underbrace{2Fe3O4}_{magnetite}+...
23 KB (2,161 words) - 11:15, 5 June 2024
goethite and ferrihydrite convert to maghemite on exposure to heat. Temperatures sufficient to elevate maghemite on a landscape scale indicate the influence...
15 KB (1,469 words) - 22:48, 25 August 2024
Hematite is not only harder than pure iron, but also much more brittle. Maghemite is a polymorph of hematite (γ-Fe 2O 3) with the same chemical formula...
23 KB (2,321 words) - 17:12, 26 August 2024
alpha phase at high temperatures. It occurs naturally as the mineral maghemite. It is ferromagnetic and finds application in recording tapes, although...
22 KB (2,072 words) - 17:04, 6 July 2024
two main forms are composed of magnetite (Fe3O4) and its oxidized form maghemite (γ-Fe2O3). They have attracted extensive interest due to their superparamagnetic...
25 KB (2,968 words) - 11:37, 20 February 2024
⇒ γ-Li 2ZnSiO 4 An alternate example is the oxidation of magnetite to maghemite. IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book")...
701 bytes (107 words) - 22:04, 16 July 2023
α-Fe2O3: alpha phase, hematite β-Fe2O3: beta phase γ-Fe2O3: gamma phase, maghemite ε-Fe2O3: epsilon phase goethite (α-FeOOH) akaganéite (β-FeOOH) lepidocrocite...
10 KB (967 words) - 03:38, 19 August 2024
composition as maghemite; to distinguish between them, their chemical formulae are generally given as γFe2O3 for hematite and αFe2O3 for maghemite. The other...
6 KB (518 words) - 04:07, 17 December 2023
lodestones has found them to be made of magnetite (Fe3O4) with inclusions of maghemite (cubic Fe2O3), often with impurity metal ions of titanium, aluminium,...
15 KB (1,577 words) - 07:51, 2 July 2024
(variety of calcite) Macaulayite Macdonaldite Mackinawite Madocite Magadiite Maghemite Magnesioferrite Magnesiohastingsite Magnesiopascoite Magnesite Magnetite...
42 KB (2,782 words) - 11:49, 1 September 2024
Manganlotharmeyerite Mlmy Mckinstryite Mck Metauranopilite Mup Monohydrocalcite Mhcal Maghemite Mgh Manganoarrojadite-(KNa) Majd-KNa Mcnearite Mnr Metauranospinite Musp...
180 KB (418 words) - 05:15, 30 June 2024
also thought to form in soils, where they probably oxidize rapidly to maghemite. The chemical composition of magnetite is Fe2+(Fe3+)2(O2-)4. This indicates...
51 KB (5,368 words) - 10:16, 2 July 2024
; et al. (2010). "Rapid magnetic heating treatment by highly charged maghemite nanoparticles on Wistar rats exocranial glioma tumors at microliter volume"...
99 KB (4,190 words) - 13:23, 26 August 2024
magnetic materials by weight. The magnetic chemicals could be magnetite and maghemite, which could come from the weathering of basalt rock. Subsequent experiments...
24 KB (2,244 words) - 20:48, 28 July 2024
and limonite (Fe2O3·nH2O) into strongly magnetic magnetite (Fe3O4) or maghemite (γ-Fe2O3), while the magnetic properties of gangue minerals remain almost...
17 KB (2,064 words) - 03:01, 28 August 2024
26 0.5 γ-Fe2O3(s) + 3 H+ ⇌ Fe3+ + 1.5 H2O maghemite 1.61 ± 0.61 0.5 γ-Fe2O3 + 1.5 H2O ⇌ Fe3+ + 3 OH− maghemite −40.59 ± 0.29 α-FeOOH(s)+ 3 H+ ⇌ Fe3+ + 2...
123 KB (5,187 words) - 01:29, 17 August 2024
copolymers with different block reactivities in order to selectively embed maghemite nanoparticles and generate periodic materials with potential use as waveguides...
40 KB (4,407 words) - 04:00, 14 August 2024
iron oxides and iron oxyhydroxides (magnetite, hematite, lepidocrocite, maghemite, goethite); Sedimentation fouling by silt and other relatively coarse...
48 KB (6,113 words) - 16:18, 13 April 2024
hematitic banded iron formations and accumulations of currently-forming maghemite pisolite alluvials. CIDs are a major source of cheap, high grade iron...
9 KB (1,342 words) - 21:28, 8 August 2024
10 Hydrohetaerolite, 10 Hausmannite, 10 Iwakiite, 10 Hetaerolite; 15 Maghemite, 20 Tegengrenite, 25 Xieite 04.BC With medium-sized and large cations:...
18 KB (1,957 words) - 19:53, 9 July 2024
the airborne dust did not contain pure magnetite or just one type of maghemite. The dust probably was an aggregate possibly cemented with ferric oxide...
48 KB (4,853 words) - 14:25, 21 August 2024
together with quartz, mullite and the iron oxides hematite, magnetite and/or maghemite. Other phases often identified are cristobalite, anhydrite, free lime...
78 KB (9,165 words) - 09:20, 28 August 2024
and he suggested in 2019 that the tetrahedral coordination arises from maghemite and magnetite impurities observed by electron microscopy. Because of the...
14 KB (1,583 words) - 00:12, 10 June 2024
quartz. Calcite, sauconite, beidellite, halloysite, thomsonite, goethite, maghemite, opal, moganite, nickel hexahydrite, accessory magnesiochromite and rivsite...
12 KB (1,564 words) - 05:28, 4 May 2024
other notable magnetic studies on NPs are those on nearly defect-free maghemite NPs, ferrihydrite NPs undoped and doped with Ni, Mo, and Ir, CdSe quantum...
19 KB (1,917 words) - 10:07, 25 October 2023
(chemical state), particles (neutral particle), glazed zinc (Zinc oxide), maghemite, awaruite, oxygen, liquids, ponderable matter, pole figure, chemical polarity...
19 KB (1,849 words) - 10:45, 21 August 2024
The pits contained red ochre consisting of the iron oxides hematite and maghemite and were covered with a lid. ”This indicates, that even though the palm...
60 KB (7,693 words) - 12:16, 14 August 2024
magnetic properties of rocks are the iron oxides, including magnetite, maghemite, hematite; and iron sulfides (particularly greigite and pyrrhotite). These...
6 KB (690 words) - 12:35, 27 October 2021